I posted a picture of my kitty on Facebook and said that I was very worried about him he’s acting very lethargic and is not purring, barley eating and cuddling which is very odd he is the world’s best cuddler and purrr machine everybody of course started asking questions. I told them the only difference was the flea collar. I said it’s just one of the cheap ones from harts immediately people started chiming in take it off. And then someone sent me the link to here. I am very glad I have found this information. I have since removed it I just hope it’s not too late. He is still acting very lethargic and not himself. I will keep you posted.